As thousands of acres burn across Southern California, wildfire smoke is causing poor air quality in the region and beyond.

Wildfires are tearing through thousands of acres in Los Angeles County in California, as strong Santa Ana winds stoke the ...

Air quality across parts of California is deteriorating to hazardous levels as strong winds drive rapid wildfire spread and ...

Millions of Los Angeles County residents are facing extremely hazardous air quality as wildfires continue to burn. The air ...

Smoke from the raging Southern California wildfires is filling city skylines, causing officials to warn residents of poor air ...

Already known for having some of the worst air quality in the U.S., people in Southern California are now also at risk of ...

Good (Green): 0-50 AQI means there is little or no health risk associated with air quality. Moderate (Yellow): 51-100 AQI ...

Delhi-NCR air quality worsens, construction banned, classes shifted, and emergency measures implemented to reduce pollution.

As thousands of acres burn across Southern California, wildfire smoke is causing poor air quality in the region and beyond.

Major air pollutants have declined in recent decades, but USA TODAY’s analysis shows wildfire smoke is taking their place.